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src="https://tyunfile.71360.com/UploadFile/shhanshang/637408580375088584/9128724.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="g7ldaco" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shhanshang/637408580375088584/9128724.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ispwy3d" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>大型抽汽背壓式汽輪機(jī)訂做商家,汽輪機(jī)</p><p><span>***更新：</span>2020-12-05 09:27:27</p><p><span id="click" >瀏覽次數(shù)：8次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="d2ikh88" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海含商建設(shè)工程有限公司</a></p><p><span>聯(lián)系人：</span>朱瑩</p><p><span>郵箱: </span>Irene_zy516@163.com</p><p><span>電話: </span>13918191286</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://shhanshang.shop.88360.com</p><p><span>手機(jī): </span>021-58210069</p><p><span>地址: </span>上海市崇明區(qū)新河鎮(zhèn)新申路921弄2號L區(qū)228室(上海富盛經(jīng)濟(jì)開發(fā)區(qū))</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="z8tvn94" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="rlxu8v8" class="box"><p><p style="text-indent:25px">汽輪機(jī)的排汽壓力越低，蒸汽循環(huán)的熱效率就越高。不過排汽壓力主要取決于冷卻水的溫度，如果采用過低的排汽壓力，就需要增大冷卻水流量或增大凝汽器冷卻面積，同時末級葉片也較長。凝汽式汽輪機(jī)常用的排汽壓力為0.005～0.008兆帕。船用汽輪機(jī)組為了減輕重量，減小尺寸，常用0.006～0.01兆帕的排汽壓力。此外，大型抽汽背壓式汽輪機(jī)訂做商家，提高汽輪機(jī)熱效率的措施還有，采用回?zé)嵫h(huán)、采用再熱循環(huán)、采用供熱式汽輪機(jī)等。提高汽輪機(jī)的熱效率，對節(jié)約能源有著重大的意義。大型汽輪機(jī)組的研制是汽輪機(jī)未來發(fā)展的一個重要方向，大型抽汽背壓式汽輪機(jī)訂做商家，大型抽汽背壓式汽輪機(jī)訂做商家，這其中研制更長的末級葉片，是進(jìn)一步發(fā)展大型汽輪機(jī)的一個關(guān)鍵。汽輪機(jī)具有單機(jī)功率大、效率高、壽命長等優(yōu)點(diǎn)。大型抽汽背壓式汽輪機(jī)訂做商家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="大型抽汽背壓式汽輪機(jī)訂做商家,汽輪機(jī)" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408580375088584/9128724.png"></div><p style="text-indent:25px">汽輪機(jī)在安裝或檢修的過程中，由于檢修工藝和檢修技術(shù)的原因，使內(nèi)缸、汽缸隔板、隔板套及汽封套的膨脹間隙不合適，或是掛耳壓板的膨脹間隙不合適，運(yùn)行后產(chǎn)生巨大的膨脹力使汽缸變形。使用的汽缸密封劑質(zhì)量不好、雜質(zhì)過多或是型號不對；汽缸密封劑內(nèi)若有堅硬的雜質(zhì)顆粒就會使密封面難以緊密的結(jié)合。汽缸螺栓的緊力不足或是螺栓的材質(zhì)不合格。汽缸結(jié)合面的嚴(yán)密性主要靠螺栓的緊力來實(shí)現(xiàn)的。機(jī)組的起?；蚴窃鰷p負(fù)荷時產(chǎn)生的熱應(yīng)力和高溫會造成螺栓的應(yīng)力松弛，如果應(yīng)力不足，螺栓的預(yù)緊力就會逐漸減小。如果汽缸的螺栓材質(zhì)不好，螺栓在長時間的運(yùn)行當(dāng)中，在熱應(yīng)力和汽缸膨脹力的作用下被拉長，發(fā)生塑性變形或斷裂，緊力就會不足，使汽缸發(fā)生泄漏的現(xiàn)象。凝式汽輪機(jī)廠家直供汽輪機(jī)汽缸的上半和下半均在垂直方向被分為三個部分。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="大型抽汽背壓式汽輪機(jī)訂做商家,汽輪機(jī)" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408580276690388/9513330.png"></div><p style="text-indent:25px">提高汽輪機(jī)熱效率的措施還有，采用回?zé)嵫h(huán)、采用再熱循環(huán)、采用供熱式汽輪機(jī)等。提高汽輪機(jī)的熱效率，對節(jié)約能源有著重大的意義?，F(xiàn)代核電站汽輪機(jī)的數(shù)量正在快速增加，因此研究適用于不同反應(yīng)堆型的、性能良好的汽輪機(jī)具有特別重要的意義。另外，在汽輪機(jī)設(shè)計、制造和運(yùn)行過程中，采用新的理論和技術(shù)，以改善汽輪機(jī)的性能，也是未來汽輪機(jī)研究的一個重要內(nèi)容。例如：氣體動力學(xué)方面的三維流動理論，濕蒸汽雙相流動理論；強(qiáng)度方面的有限元法和斷裂力學(xué)分析；振動方面的快速傅里葉轉(zhuǎn)換、模態(tài)分析和激光技術(shù)；設(shè)計、制造工藝、試驗(yàn)測量和運(yùn)行監(jiān)測等方面的電子計算機(jī)技術(shù)；壽命監(jiān)控方面的超聲檢查和耗損計算。</p><p style="text-indent:25px">汽輪機(jī)汽缸在運(yùn)行時受力的情況很復(fù)雜，除了受汽缸內(nèi)外氣體的壓力差和裝在其中的各零部件的重量等靜載荷外，還要承受蒸汽流出靜葉時對靜止部分的反作用力，以及各種連接管道冷熱狀態(tài)下對汽缸的作用力，在這些力的相互作用下，汽缸發(fā)生塑性變形造成泄漏。汽缸的負(fù)荷增減過快，特別是快速的啟動、停機(jī)和工況變化時溫度變化大、暖缸的方式不正確、停機(jī)檢修時打開保溫層過早等，在汽缸中和法蘭上產(chǎn)生很大的熱應(yīng)力和熱變形。汽缸在機(jī)械加工的過程中或經(jīng)過補(bǔ)焊后產(chǎn)生了應(yīng)力，但沒有對汽缸進(jìn)行回火處理加以消除，致使汽缸存在較大的殘余應(yīng)力，在運(yùn)行中產(chǎn)生長久的變形。超超臨界壓力汽輪機(jī)：主蒸汽壓力大于32Mpa。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="大型抽汽背壓式汽輪機(jī)訂做商家,汽輪機(jī)" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408580329873773/4289546.png"></div><p style="text-indent:25px">早期汽輪機(jī)所用新蒸汽壓力和溫度都較低，熱效率低于20％。隨著單機(jī)功率的提高，30年代初新蒸汽壓力已提高到3～4兆帕，溫度為400～450℃。隨著高溫材料的不斷改進(jìn)，蒸汽溫度逐步提高到535℃，壓力也提高到6～12.5兆帕，個別的已達(dá)16兆帕，熱效率達(dá)30％以上。50年代初，已有采用新蒸汽溫度為600℃的汽輪機(jī)。以后又有新蒸汽溫度為650℃的汽輪機(jī)?，F(xiàn)代大型汽輪機(jī)通常采用新汽壓力24兆帕，新汽溫度和再熱溫度為535～565℃的超臨界參數(shù)，或新汽壓力為16.5兆帕、新汽溫度和再熱溫度為535℃的亞臨界參數(shù)。使用這些汽輪機(jī)的電站熱效率約為40％。套裝轉(zhuǎn)子在高溫下，葉輪與主軸易發(fā)生松動。所以不宜作為高溫汽輪機(jī)的高壓轉(zhuǎn)子。凝式汽輪機(jī)廠家直供</p><p style="text-indent:25px">汽輪機(jī)剛性聯(lián)軸器：傳遞振動和軸向位移，對中性要求高。大型抽汽背壓式汽輪機(jī)訂做商家</p><p style="text-indent:25px">汽輪機(jī)需要注意：卡環(huán)有無裂紋、破損，螺栓有無滑牙，是否達(dá)到安全系數(shù)。檢查葫蘆有無滑鏈，葫蘆鉤有無變型，鏈扣焊口有無被腐蝕、卡鏈等現(xiàn)象。行車剎車、潤滑系統(tǒng)是否良好、可靠。各起重設(shè)備有無試吊合格證明。檢查是否只有一個人負(fù)責(zé)指揮，并佩戴明顯的指揮袖章。起重人員是否持證上崗，人員搭配是否合理可靠。起吊場地是否完備：燈光是否充足。吊物在空中移動時下方是否撤離人員，有無避開下方重要設(shè)備。擺放位置是否合理，有無核算承載力。揭缸組織機(jī)構(gòu)人員是否全部到位，是否辦理業(yè)主和主要負(fù)責(zé)人簽字確認(rèn)和下達(dá)揭缸令。大型抽汽背壓式汽輪機(jī)訂做商家</p><p style="text-indent:25px">上海含商建設(shè)工程有限公司一直專注于市政公用工程，管道工程，機(jī)電設(shè)備安裝、維修（除特種設(shè)備），化工產(chǎn)品及原料（除危險化學(xué)品、監(jiān)控化學(xué)品、煙花爆竹、民用物品、易制毒化學(xué)品）、儀器儀表、五金交電、橡塑制品、建筑材料、裝潢材料、電子產(chǎn)品、日用百貨的銷售，機(jī)械設(shè)備技術(shù)領(lǐng)域內(nèi)的技術(shù)開發(fā)、技術(shù)轉(zhuǎn)讓、技術(shù)咨詢和技術(shù)服務(wù)。，是一家機(jī)械及行業(yè)設(shè)備的企業(yè)，擁有自己**的技術(shù)體系。一批專業(yè)的技術(shù)團(tuán)隊(duì)，是實(shí)現(xiàn)企業(yè)戰(zhàn)略目標(biāo)的基礎(chǔ)，是企業(yè)持續(xù)發(fā)展的動力。上海含商建設(shè)工程有限公司主營業(yè)務(wù)涵蓋維修高壓主汽門、高壓調(diào)門，維修中壓主汽門、中壓調(diào)門，閥座的車削、堆焊、補(bǔ)焊，熱處理、研磨，堅持“質(zhì)量保證、良好服務(wù)、顧客滿意”的質(zhì)量方針，贏得廣大客戶的支持和信賴。一直以來公司堅持以客戶為中心、維修高壓主汽門、高壓調(diào)門，維修中壓主汽門、中壓調(diào)門，閥座的車削、堆焊、補(bǔ)焊，熱處理、研磨市場為導(dǎo)向，重信譽(yù)，保質(zhì)量，想客戶之所想，急用戶之所急，全力以赴滿足客戶的一切需要。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2277377.html</p></div></div></div></div></div><div id="eyacen8" class="page-right twoColRt"><div id="eiurtsp" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="87ta32y" class="recomPic 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